The parameters used in the simulation are listed in Tab. REF . The fading coefficient \(\beta _k\)  is given by [1]}
\(\begin{aligned}\beta _k = \eta _k\sqrt{G_\mathrm {t}G_\mathrm {r}G\frac{L^2\frac{\lambda ^4}{4}}{64\pi ^3d_k^4}}\end{aligned}\) 
